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Internet protocol multimedia subsystem (IMS) restoration support for temporary globally routable user agent uniform resource identifier (GRUU)

a technology of multimedia subsystem and user agent, which is applied in the direction of transmission, electrical equipment, etc., can solve the problems of inability to restore, all previously generated t-gruus are lost, and the algorithm defined in rfc5627 cannot support the retrieval of aor, instance-id, call-id and cseq values from the t-gruus

Active Publication Date: 2019-01-29
NOKIA SOLUTIONS & NETWORKS OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

Enables the proper identification and validation of received T-GRUUs, ensuring that only valid T-GRUUs are restored during IMS registration, thereby closing the gap in current 3GPP IMS restoration procedures.

Problems solved by technology

Currently, the algorithm defined in RFC5627 doesn't support the retrieval of AoR, instance-ID, Call-ID and CSeq values from the T-GRUU.
Though the latest T-GRUU can be stored in HSS and can be restored at S-CSCF, all previously generated T-GRUUs are lost and cannot be restored.

Method used

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  • Internet protocol multimedia subsystem (IMS) restoration support for temporary globally routable user agent uniform resource identifier (GRUU)
  • Internet protocol multimedia subsystem (IMS) restoration support for temporary globally routable user agent uniform resource identifier (GRUU)
  • Internet protocol multimedia subsystem (IMS) restoration support for temporary globally routable user agent uniform resource identifier (GRUU)

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Embodiment Construction

[0069]In the following, some example versions of the disclosure and embodiments of the present invention are described with reference to the drawings. For illustrating the present invention, the examples and embodiments will be described in connection with a cellular communication network based on a 3GPP based communication system, for example an LTE / LTE-A based system. However, it is to be noted that the present invention is not limited to an application using such type of communication system or communication network, but is also applicable in other types of communication systems or communication networks and the like.

[0070]The following examples versions and embodiments are to be understood only as illustrative examples. Although the specification may refer to “an”, “one”, or “some” example version(s) or embodiment(s) in several locations, this does not necessarily mean that each such reference is to the same example version(s) or embodiment(s), or that the feature only applies t...

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Abstract

The present invention provides apparatuses, methods, computer programs, computer program products and computer-readable media regarding IMS (Internet Protocol Multimedia Subsystem) restoration support for temporary GRUU (Globally Routable User Agent Uniform Resource Identifier). Certain aspects of the present invention include creating, at a registrar, a registration identified by a registration identifier, and storing, by the registrar, the registration identifier, a call identifier and an initial command sequence related to the registration identified by the registration identifier in a persistent database during the registration.

Description

FIELD OF THE INVENTION[0001]The present invention relates to apparatuses, methods, systems, computer programs, computer program products and computer-readable media regarding IMS (Internet Protocol Multimedia Subsystem) restoration support for temporary GRUU (Globally Routable User Agent Uniform Resource Identifier).BACKGROUND OF THE INVENTION[0002]Some procedures required in 3GPP (3rd Generation Partnership Project) IMS to handle a S-CSCF (Serving Call Session Control Function) service interruption scenario with minimum impact to the service to the end user are described in 3GPP technical specification TS 23.380, which specifies how IMS restoration can be supported. Further, 3GPP TS 29.228 and 29.229 define how the information for IMS restoration is exchanged between HSS (Home Subscriber Server) and S-CSCF.[0003]Furthermore 3GPP TS 24.229 includes the support of Globally Routable User Agent URIs (GRUUs), which is defined in RFC5627.[0004]As defined in TS 23.228, section 4.3.3.2a, a...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): H04L29/06H04L29/08
CPCH04L65/1073H04L67/306H04L65/1033H04L65/1016
Inventor SHEN, JIADONGWIEHE, ULRICH
Owner NOKIA SOLUTIONS & NETWORKS OY